Shoe, boot, and the like



July 14, 1931. G. E. KARLSON SHOE, BOOT, AND THE LIKE Filed Feb. '7, 1950 @Q Kauf/san /NveN/alg Z1 @in Patented July 14, 1931 UNITED STATES GEORG EMANUEL KARLSON, F STOCKHOLM, SWEDE SHOE, BOOT, AND TEEYLIKE Application led February 7,v 1930, Serial No. 426,634, and in Sweden January 3, 1929.

It is before known to stillen the shank of shoes, boots or the like by means of a plate, so called shank-spring which is placed between the soles and covered by a complemen- 5, tal sole. Further it, has been proposed tc shape the Shankspring in a special manner,

so that it serves as a sup verse arch of the foot. lso in this case a complement-al sole must bev used. The provision of a shank-spring constituting a support for the transverse arch of the foot or not, and of a complemental sole separated from one another complicates the manufacturing of the shoe and, besides, shank-springs provided with a support for the transverse arch of the foot effected by forcing the material upwards tends to break through the sole and in addition hereto renders difficult the halfsoling operation. y

The present invention relates to an interlining, which mounted between the soles at the shank of a shoe or boot firstly constitutes a substitution for the shank-spring as well as for the complemental sole and secondly serves in an advantageous manner as a support for the transverse arch of the foot. The present interlining consists of a comparatively sti but however springy plate, preferably of metal, which is completely or nearly so enclosed by an elastic cover or india rubber or equivalent material, which at the one end of the said plate is so shaped that it const-itutes a dome shaped swell, serving as a support for the transverse arch of the foot.

The cover enclosing the said member replaces the usual complemental sole and, besides, constitutes a protection, which prevents the member from being attacked by rust. Further, the elastic cover prevents the ends of the plate from having a tearing or breaking action on the soles. Owing to the fact that the cupola-like swell is made integral with the cover it remains in a reliable manner in its position relatively to the plate` which is especially important regarding supports for the transverse arch of the foot.

A form of execution of the invention is shown in the accompanying drawings in which Fig. l is a longitudinal section of the present interlining. Fig. 2 is a plan View of ort for the trans.

.an ordinary complemental sole.

the interlining and Fig. 3 is a cross section of the same. Fig. 4 shows in a side view partially in section a shoe provided with the interlining.

l is a comparatively rigid but however u springy plate preferably of metal. `The shape and the size of the said plate are adapted to the shank of the shoe, in which it is to be used. The plate 1 is surrounded by a cover 2.ofan elastic material such as 501 india rubber, which, preferably, encloses the plate completely. The said cover may be effected in such manner, that plates of india rubber especially prepared by the vulcanizing process and of suitable dimensions are 3| placed at opposite sides of the springy plate and forced against each other in a suitable mould, which is heated to the necessary vulcanizing temperature, so that the plate is completely embedded. Openings 4 are pro- 7| vided in the metal plate and the plates of india rubber which permit the centering of the metal plate with rela-tion to the plates of india rubber by means of guide pins. Preferably, protect-lng pieces 3 of a fabric or II the like are placed around the ends of the if plate 1. The contour of the plate, Fig. 2,

corresponds substantially to the contour of A dome shaped swell 5 of the cover is located above gg the fore end of plate 1, which is so adapted, that, as the plate has been mounted between y the soles of a shoe, or boot, the rise of the insole thus effected byftihe said swell serves as an effective support for the transverse arch 35 of the foot. Fig. 4 illustrates clearly the manner in vwhich thev plate is mounted between the outersole and the insole 7.

The dome shaped swell 5 may be effected by providing between one of the plates of india rubber and the plate 1 one o-r more pieces of india rubber or the like of the intended shape. The plates of india rubber may be prepared in any suitable manner and, if necessary, provided with reinforcements for instance of .a fabric.

In addition to the fact that the present interlining in an advantageous manner substitutes the ordinary shank-spring and the complemental sole, it also constitutes by 10G means of the insole an effective support for the transverse arch 'of the foot, which support compared with the loosely mounted instep-arch support involves the advantage of s the bones being supported in the desired manner also after the. -shoe has been used for some time, Whieh not always is the easewhen loosely mounted*instep arehfsupports are' used. Besides, it is not necessary generally n to select or adapt the interlininrer for each wearer separately', but a certain type may be used for a certain size of shoes provided that the foot has no .serious abnormalities or de'- feets regarding its shape, a Certain standardizing being thereby rendered possible.

I claim:

A shoe, boot or the like provided with a shank piece placed between the soles, said shank piece comprising a stift' but resilient,

l plate, an elastic protective cover completely surrounding said plate, and a dome-shaped swell on said cover, stiffened bv and in the vicinity ot the foremost end ot' the plate, the

shankfpieee serving,lr as a support for the longitudinal and transverse arches of the foot.

In teatimony whereof I have hereunto affixed my signature.

GEORG EMANUEL KARLSON. 

